Modelling and texturing specific wood flooring
The small bumps can be done using a normal map which essentially are images that tell Blender that the surface is not smooth, and to extrude the mesh in and out on the flat planes according to the normal map. There is a pretty good tutorial on how to generate normal maps from texture images here.

To apply the normal map to your object, head over to the shading workspace.

Add a new image texture node and open the normal map image. At the bottom of the image texture, make sure you select "Non-Color" under the Color Space drop-down menu.

Connect the color output into a Normal Map node, and that into the Normal input for the principled BDSF node.


If you want to go even further with realism, consider checking out this tutorial by Blender Guru. It's using an older version of Blender, but the same principles still apply. The only main difference would be in setting up the nodes for the reflection maps and all.